Bridging board

Abstract

An upstream side motherboard 50 having an upstream side system slot 51 and upstream side daughter board mounting slots 52 to 58 and a downstream side motherboard 60 having a downstream side system slot 61 and downstream side daughter board mounting slots 62, 63 . . . are connected together by a bridging board 10. The bridging board 10 has bridge wires that electrically connect a plurality of wiring pins provided in the upstream side daughter board mounting slots and a plurality of wiring pins provided in the downstream side system slot when an upstream side connector 11 is fitted into one the upstream side daughter board mounting slots and a downstream side connector 12 is fitted into the downstream side system slot 61, and IC switches 13 and 14 that carry out connection changing on prescribed wires out of the bridge wires.

What is claimed is:  
     
       1. A bridging board that connects together an upstream side motherboard having an upstream side system slot and one or more upstream side daughter board mounting slots and a downstream side motherboard having at least a downstream side system slot, 
       the bridging board having an upstream side connector fittable into one of said upstream side daughter board mounting slots and a downstream side connector fittable into said downstream side system slot,  
       and also having a plurality of bridge wires that electrically connect a plurality of wiring pins provided in one of said upstream side daughter board mounting slots and a plurality of wiring pins provided in said downstream side system slot when said upstream side connector is fitted into said one of said upstream side daughter board mounting slots and said downstream side connector is fitted into said downstream side system slot, and IC switches that carry out connection changing of said bridge wires, which are connected to bus wires having a non-parallel wiring configuration in said upstream side and downstream side daughter board mounting slots.  
       wherein both said upstream side connector and said downstream side connector are provided on a same face of a bridging board substrate and are plugged into said one of said upstream side daughter board mounting slots and said downstream side system slot, respectively, whereby said bridging board locates said upstream side motherboard and said downstream side motherboard extending in substantially uniplanar, edge-to-edge relation to each other.  
     
     
       2. The bridging board according to  claim 1 , wherein said IC switches are composed of connection change setting ICs and connection change setting selector switches. 
     
     
       3. The bridging board according to  claim 2 , further having a configuration wherein said upstream side connector, said downstream side connector and a system setting IC are provided on a rear face of a substrate and said connection change setting ICs and said connection change setting selector switches are provided on a front face of said substrate. 
     
     
       4. The bridging board according to  claim 1 , wherein said downstream side motherboard has one or more downstream side daughter board mounting slots in addition to said downstream side system slot. 
     
     
       5. The bridging board according to  claim 2 , wherein said connection change setting selector switches are short pin switches.